干旱区生态环境知识资源中心(Arid): Lake-Level Oscillation Based on Sediment Strata and Geochemical Proxies Since 11,000 Year From Tengger Nuur, Inner Mongolia, China

Arid

DOI	10.3389/feart.2020.00314
	Lake-Level Oscillation Based on Sediment Strata and Geochemical Proxies Since 11,000 Year From Tengger Nuur, Inner Mongolia, China
	Zhang Chengjun; Zhang Li; Zhang Wanyi; Tao Yunhan; Liu Yang; Wan Xiangling; Zhang Zhen; Khomid, Safarov
通讯作者	Zhang, CJ
来源期刊	FRONTIERS IN EARTH SCIENCE
EISSN	2296-6463
出版年	2020
卷号	8
英文摘要	A 794-cm section was collected from Tengger Nuur in the Inner Mongolian Plateau. Accelerator mass spectrometry(14)C data were determined to set an age-depth model after removing about 1920 years of the carbon reservoir effect. Based on the multi-proxies grain size, carbonate-content, total organic carbon-content, ratio of C/N, ratios of Mg/Ca and Sr/Ca, and carbonate carbon and oxygen isotopes, paleoenvironmental changes since the last deglaciation were reconstructed. Tengger Nuur was very shallow during the last deglaciation under a cool and wet climate, especially during the interval of the cold Younger Dryas event. Although, temperature and humidity increased from the early Holocene (similar to 10,450-8750 cal a BP), low lake levels indicated that the summer monsoon was not sufficiently strong to reach the modern monsoon boundary in Inner Mongolia. High monsoon precipitation caused lake expansion during 8750-5000 cal a BP, but the lake level oscillated in a shallow state under high evaporation. A low lake-level event occurred with the interval of a cold-wet climate during 5450-5100 cal a BP. The summer monsoon receded gradually to maintain a deep lake under high effective humidity during 5000-2000 cal a BP, punctuated by low lake-level events at intervals of 4300-3980 cal a BP and 3700-2750 cal a BP. With the arrival of the cold and dry westerly after 2000 cal a BP, lakes shrank gradually to become salinized or completely desiccated, but their levels oscillated at shallow depths during the four periods of 1900-1800 cal a BP, 1500-1050 cal a BP, 550-400 cal a BP (Little Ice Age), and 100 cal a BP-AD 1985. Therefore, the eastern summer monsoon was weak in the early Holocene, and lake-level oscillation was controlled by effective humidity in arid and semi-arid areas.
英文关键词	Tengger Nuur Holocene stratigraphy weak summer monsoon effective humidity
类型	Article
语种	英语
开放获取类型	DOAJ Gold
收录类别	SCI-E
WOS记录号	WOS:000563330400001
WOS关键词	NORTH-CENTRAL CHINA ; ASIAN MONSOON ; ENVIRONMENTAL-CHANGES ; LACUSTRINE SEDIMENTS ; HOLOCENE VEGETATION ; LATE PLEISTOCENE ; TIBETAN PLATEAU ; HIGH-RESOLUTION ; CLIMATE CHANGES ; QINGHAI LAKE
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325852
作者单位	[Zhang Chengjun] Lanzhou Univ, Coll Earth Sci, Lanzhou, Peoples R China; Lanzhou Univ, Key Lab Mineral Resources Western China Gansu Pro, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Zhang Chengjun,Zhang Li,Zhang Wanyi,et al. Lake-Level Oscillation Based on Sediment Strata and Geochemical Proxies Since 11,000 Year From Tengger Nuur, Inner Mongolia, China[J]. 兰州大学,2020,8.
APA	Zhang Chengjun.,Zhang Li.,Zhang Wanyi.,Tao Yunhan.,Liu Yang.,...&Khomid, Safarov.(2020).Lake-Level Oscillation Based on Sediment Strata and Geochemical Proxies Since 11,000 Year From Tengger Nuur, Inner Mongolia, China.FRONTIERS IN EARTH SCIENCE,8.
MLA	Zhang Chengjun,et al."Lake-Level Oscillation Based on Sediment Strata and Geochemical Proxies Since 11,000 Year From Tengger Nuur, Inner Mongolia, China".FRONTIERS IN EARTH SCIENCE 8(2020).